[2] The Emperor of Manchukuo, Puyi, travelled along this line when he visited the Sup'ung Dam.

[1] Following the partition of Korea the line was located within the Soviet zone of occupation, and was nationalised along with all the other railways in the zone by the Provisional People’s Committee for North Korea on 10 August 1946,[1] becoming part of the Korean State Railway.

Electrification of the entire line was completed in 1980, and at the same time, semi-automatic train control was installed on the 41.3 km (25.7 mi) section between Chŏngju and Kusŏng.

[3] The line serves a variety of industries, including a textile factory in Kusŏng, a chemical factory in Ch'ŏngsu, and North Korea's largest lignite mine near P'ungnyŏn, as well as shipping large amounts of wood south from Amrokkang Station on the Yalu River.

[3] A yellow background in the "Distance" box indicates that section of the line is not electrified.